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### Topic: Calculating Mass  (Read 4655 times)

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#### kamehamehaaa

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##### Calculating Mass
« on: September 24, 2006, 10:33:11 PM »
Hello can someone help me calculate the mass of Cu(NO3)23H2O needed to prepare 50.0mL of a .50 M Cu(II) solution?

I would appreciate it if you can help me through this problem by telling me what I should do rather than give me the answer.

Thanks

#### Bakegaku

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##### Re: Calculating Mass
« Reply #1 on: September 24, 2006, 10:48:17 PM »
Do you know how to figure out what the molar mass of Cu(NO3)2*3H2O is?
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#### kamehamehaaa

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##### Re: Calculating Mass
« Reply #2 on: September 24, 2006, 11:07:23 PM »
Yeah I got the molar mass to be 241.599 grams, but I don't know how to set it up from there.

#### BaO

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##### Re: Calculating Mass
« Reply #3 on: September 25, 2006, 01:56:05 AM »
i'm not sure if i'm right . but i think first of all , you would have to write a balanced chemical equation .from that you can figure it out. i think so.

#### Borek

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##### Re: Calculating Mass
« Reply #4 on: September 25, 2006, 02:27:51 AM »
Yeah I got the molar mass to be 241.599 grams, but I don't know how to set it up from there.

How would you go from here in the case of Cu(NO3)2?
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#### Mitch

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##### Re: Calculating Mass
« Reply #5 on: September 25, 2006, 03:43:45 AM »
The molar mass would be 241.599 g/mol
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#### Bakegaku

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##### Re: Calculating Mass
« Reply #6 on: September 25, 2006, 07:30:48 AM »
Quote
Yeah I got the molar mass to be 241.599 grams, but I don't know how to set it up from there.

When Copper (II) Nitrate dissolves, how many moles of Cu2+ are released per mole of Cu(NO3)2?
"True knowledge exists in knowing that you know nothing"
-Socrates

"I see, I forget.  I hear, I remember.  I do, I understand"
-Confucius

"Nothing will benefit human health and increase chances for survival of life on Earth as much as the evolution to a vegetarian diet."
- Albert Einstein?

"American cartoons place characters in situations; anime
places situations around characters.  Anime characters
are not like fictional characters but more like fictional
people; their actions stem directly from their personalities,
and not just as a means to move the story's plot
forward.  We are made to sympathize with them, and
not simply be entertained by them."
~John Oppliger~